[sdiy] isolating variac unit

[KA4HJH]

>> >Loads?   That can be all over the place depending on what sort of gear
>> > you're working on.
>>
>> Of course. We used a set of switched loads over the range of the supplies
>> we were repairing. Sometimes one would work fine on say 75 ohms but die on
>> 25 ohms. This is why I've been collecting a variety of high wattage
>> resistors for years.
>
>What sorts of values have you found most useful?

With every supply you can use Ohm's Law to work out the full load
resistance but it's useful to have, say, a half and a quarter of what the
supply can handle as well. They do sometimes break down as you increase the
load (I'm thinking linear supplies here). This is why I'm still collecting
resistors--you never know exactly what values you're going to need some
day. Things like 12V/15V at 1A, .5A, .25A would be useful loads to have
around. Or whatever resistors you can find that will be close to those
values.

I have a pair of 8ohm 100W resistors. Great for discharging/overheating
batteries.

-- 

Terry Bowman, KA4HJH
"The Mac Doctor"